Vol. 11, Special Issue 7 (2022)

Author(s):
Amandeep, Gaje Singh, Pradeep Kumar Verma, Avinash Varma and Ramajeet Chaudhary

Abstract:
The experiment was carried out in randomized block design with three replications during Kharif, 2019 at Crop Research Centre of Sardar Vallabh Bhai Patel University of Agri. & Tech., Meerut. The first incidence of rice stem borer was recorded on fourth week of June and reached its peak (9.11 per cent dead hearts) during fourth week of August when average temperature and relative humidity were 320C and 65.6 per cent, respectively. The first incidence of rice leaf folder was recorded on first week of July and reached a maximum level at the third week of September when mean temperature and relative humidity were 28.40C and 87 per cent, respectively. There was positive correlation of dead hearts with evening RH, morning RH, minimum and maximum temperature. The correlation relationship of relative humidity, minimum temperature and maximum temperature is negative with per cent white ears. The correlation of rice leaf folder was positive with minimum temperature, RH and rainfall and negative with maximum temperature.